一种运输车辆及运输车辆的后门用启闭装置
By installing a dustproof component on the outside of the hydraulic cylinder, the problem of easy intrusion of the hydraulic cylinder piston rod in a dusty environment is solved, achieving dustproof effect and convenient maintenance, and improving the reliability and service life of the rear door opening and closing device of the transport vehicle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-17
AI Technical Summary
The hydraulic cylinder piston rod of the existing rear door opening and closing device of transport vehicles is easily invaded by impurities in dusty environments, leading to wear of seals and leakage of hydraulic oil, which affects the stability and safety of opening and closing power.
A dustproof component is installed outside the hydraulic cylinder, including a dustproof net and an elastic inner liner. The movable ring cooperates with the rotating shaft to prevent dust from entering. Combined with the elastic arc-shaped clip and bayonet design, the dustproof net can be flexibly installed and removed and moved synchronously.
It effectively prevents dust intrusion, reduces seal wear and hydraulic oil leakage, extends equipment life, facilitates maintenance, and ensures the normal operation of the opening and closing device.
Smart Images
Figure CN224515008U_ABST
Abstract
Claims
1. A transport vehicle, comprising a transport vehicle body (1) and a rear door opening and closing mechanism (2), wherein the transport vehicle body (1) comprises a cargo box (11), a floor plate (12), several sets of tire assemblies (13) and two sets of hydraulic rod assemblies (14), wherein the rear door opening and closing mechanism (2) comprises a rear door body (22), wherein a toggle block (23) is fixedly connected to both outer walls of the rear door body (22) near the lower end, wherein a first connecting seat (24) is fixedly connected to both outer walls of the cargo box (11) near the rear door body (22), wherein a second connecting seat (26) is fixedly connected to the outer wall of the toggle block (23), and a hydraulic cylinder (25) is hinged between the first connecting seat (24) and the second connecting seat (26); characterized in that The outer end of the hydraulic cylinder (25) is fitted with a dustproof component. The dustproof component includes a fixed ring (3) fixedly connected to the outer end of the cylinder barrel of the hydraulic cylinder (25). A dustproof net (32) is provided on the outer wall of one end of the fixed ring (3). An elastic inner lining strip (33) is provided inside the dustproof net (32). A movable ring (31) is fixedly connected to one end of the dustproof net (32) and fitted onto the piston rod end of the hydraulic cylinder (25). A circular buckle (301) is provided on both outer ring walls of the movable ring (31). An elastic arc-shaped buckle (34) is fixedly connected inside the circular buckle (301). An elastic groove (302) is provided through the upper and lower ends of the elastic arc-shaped buckle (34). A rotating shaft (27) connected to the top end of the hydraulic cylinder (25) is rotatably connected inside the second connecting seat (26).
2. A transport vehicle according to claim 1, characterized in that: The carriage (11) is rotatably mounted on one side of the top of the floor plate (12). Several sets of tire assemblies (13) are provided on both sides of the floor plate (12). Two hydraulic rod assemblies (14) are hinged between the floor plate (12) and the carriage (11).
3. A transport vehicle according to claim 1, characterized in that: The rear door body (22) is rotatably connected to a movable support seat (21) distributed at the top edge of the carriage (11), and the cross-section of the rear door body (22) is L-shaped.
4. A transport vehicle according to claim 1, characterized in that: The upper and lower ends of the inner edge of the movable ring (31) are fixedly connected with a ring-shaped baffle (311).
5. A transport vehicle according to claim 1, characterized in that: The inner diameter of the circular bayonet (301) is larger than the outer diameter of the rotating shaft (27), and the elastic arc-shaped locking strip (34) and the rotating shaft (27) are interference fit.
6. An opening and closing device for a rear door of a transport vehicle, characterized by: Includes the rear door opening and closing mechanism (2) according to any one of claims 1 to 5.